For standard applications in process andenvironmental technology, with dirt-repellentPTFE diaphragm, built-in temperature sensor(optional for analog sensor)

Application

• Long-term monitoring and limit value monitoring of processes with stable processconditions– Chemical industry: strong acids/bases, plastic, pulp and paper industry– Power plants (e.g. flue gas cleaning), oil and gas– Incinerator plants

• Water/wastewater treatment– Boiler feedwater and cooling water– Well water and drinking water– All industrial and municipal treatment plants

With ATEX, IECEx, FM, CSA, TIIS and NEPSI approval for use in hazardous areas

Your benefits

• Low-maintenance and robust thanks to large PTFE ring junction• Can be used at pressures up to 17 bar abs. (246 psi)• Process glass also for very alkaline applications (BA and BT versions)• Process glass for applications in media containing hydrofluoric acid (FA version)• For media with low conductivity (AS version)• Integrated NTC30K temperature sensor (Memosens) for effective temperature

compensation; Pt100 or Pt1000 for analog sensors• Optional: Poison-resistant reference with ion trap

Other advantages of Memosens technology

• Maximum process safety• Data security thanks to digital data transmission• Very easy to use as sensor data saved in the sensor• Recording of sensor load data in the sensor enables predictive maintenance with

the Memobase Plus CYZ71D

Products Solutions Services

Technical InformationOrbisint CPS11D and CPS11pH electrodes, analog or with digital Memosenstechnology

TI00028C/07/EN/14.1571299911

Orbisint CPS11D and CPS11

2 Endress+Hauser

Function and system design

Measuring principle pH measurementThe pH value is used as a unit of measurement for the acidity or alkalinity of a liquid medium. Themembrane glass of the electrode supplies an electrochemical potential which is dependent upon thepH value of the medium. This potential is generated by the selective penetration of H+ ions throughthe outer layer of the membrane. An electrochemical boundary layer with an electric potential formsat this point. An integrated Ag/AgCl reference system serves as the required reference electrode.The transmitter converts the measured voltage into the corresponding pH value using the Nernstequation.

Measuring system A complete measuring system comprises at least the following components:• pH electrode CPS11D or CPS11• Transmitter, e.g. Liquiline CM42, CM44x, Mycom S CPM153, Liquisys M CPM2x3• Memosens data cable CYK10 for Memosens sensors or CPK9 for analog sensors• Immersion, flow or retractable assembly, e.g. Cleanfit CPA871

3

4

1

2

A0025757

1 Example of a measuring system for pH measurement

1 Retractable assembly Cleanfit CPA8712 pH electrode CPS11D3 Memosens data cable CYK104 Liquiline M CM42 two-wire transmitter for hazardous area

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Endress+Hauser 3

CPS11D communication and data processingCommunication with the transmitter

Always connect digital sensors with Memosens technology to a transmitter with Memosenstechnology. Data transmission to a transmitter for analog sensors is not possible.

Digital sensors can store measuring system data in the sensor. These include the following:• Manufacturer data

– Serial number– Order code– Date of manufacture

• Calibration data– Calibration date– Slope at 25 °C (77 °F)– Zero point at 25 °C (77 °F)– Temperature offset– Number of calibrations– Serial number of the transmitter used to perform the last calibration

• Operating data– Temperature application range– pH application range– Date of initial commissioning– Maximum temperature value– Hours of operation under extreme conditions– Number of sterilizations– Resistance of glass membrane

You can display the abovementioned data using the Liquiline CM44x, CM42 and Memobase PlusCYZ71D.

Dependability

Reliability Easy handlingSensors with Memosens technology have an integrated electronics unit that stores calibration dataand other information (e.g. total operating hours and operating hours under extreme measuringconditions). Once the sensor has been connected, the sensor data are transferred automatically tothe transmitter and used to calculate the current measured value. As the calibration data are storedin the sensor, the sensor can be calibrated and adjusted independently of the measuring point. Theresult:• Easy calibration in the measuring lab under optimum external conditions increases the quality of

the calibration.• Pre-calibrated sensors can be replaced quickly and easily, resulting in a dramatic increase in the

availability of the measuring point .• Maintenance intervals can be defined based on all stored sensor load and calibration data and

predictive maintenance is possible.• The sensor history can be documented using external storage media and evaluation programs, e.g.

Memobase Plus CYZ71D. Thus, the current application of the sensors can be made to depend ontheir previous history.

Integrity Data security thanks to digital data transmission

Memosens technology digitizes the measured values in the sensor and transmits the data to thetransmitter using a non-contact connection that is free from potential interference. The result:• Automatic error message if sensor fails or connection between sensor and transmitter is

interrupted• Immediate error detection increases measuring point availability

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4 Endress+Hauser

Safety Maximum process safetyWith inductive transmission of the measured value using a non-contact connection, Memosensguarantees maximum process safety and offers the following benefits:• All problems caused by moisture are eliminated:

– Plug-in connection free from corrosion– Measured values cannot be distorted by moisture.– Can even be connected under water

• The transmitter is galvanically decoupled from the medium. Issues concerning "symmetrical high-impedance" or "asymmetry" or an impedance converter are a thing of the past.

• EMC safety is guaranteed by screening measures for the digital transmission of measured values.• Intrinsically safe electronics mean operation in hazardous areas is not a problem.

Input

Measured variables pH value

Temperature

Measuring range Electrode version AA (for water / wastewater), AS (for boiler feedwater):pH: 1 to 12Temperature: -15 to 80 °C (5 to 176 °F)Electrode version BA (for process):pH: 0 to 14Temperature: 0 to 135 °C (32 to 275 °F)Electrode version FA (for hydrofluoric acid process):pH: 0 to 10Temperature: 0 to 70 °C (32 to 158 °F)Electrode version BT with ion trap (for chemicals, scrubbers, pulp and paper):pH: 0 to 14Temperature: 0 to 135 °C (32 to 275 °F)

Please note the process operating conditions.

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Installation

Installation instructions Do not install the electrodes upside down. The angle of inclination must be at least 15° from thehorizontal. A smaller inclination angle is not permitted as it could cause an air bubble to form in theglass sphere and prevent the inner electrolyte from completely wetting the pH diaphragm.

NOTICEBefore screwing in the electrode, make sure the threaded connection of the assembly is cleanand runs smoothly.‣ Screw in the electrode finger-tight (3 Nm)! (Data apply only if installing with Endress+Hauser

assemblies.)‣ Make sure to follow the installation instructions in the Operating Instructions of the used

assembly.

15° 15°

A

B

A0024316

2 Electrode installation; installation angle at least 15° from the horizontal

A Permitted orientationB Forbidden orientation

Environment

Ambient temperature NOTICERisk of damage due to frost‣ The sensor must not be used if the temperature drops below –15 °C (5 °F).

Storage temperature 0 to 50 °C (32 to 122 °F)

Degree of protection IP 68: Memosens plug-in head, (10 m (33 ft) water column, 25 °C (77 °F), 45 days, 1 M KCl)IP 68: TOP68 plug-in head, autoclavable up to 135 °C (275 °F), (1 m (3.3 ft) water column,

50 °C (122 °F), 168 h)IP 67: GSA plug-in head (with closed connector system)

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Process

Process temperature Version AA, AS: -15 to 80 °C (5 to 176 °F)Version BA, BT: 0 to 135 °C (32 to 275 °F)Version FA: 0 to 70 °C (32 to 158 °F)

Process pressure (absolute) Version AA, AS, FA: 1 to 7 bar (15 to 101 psi)Version BA, BT: 1 to 17 bar (15 to 246 psi)

LCAUTIONPressurization of sensor due to prolonged use under increased process pressureRisk of injury from glass breakage‣ Avoid excessive heating of such sensors if using them under reduced process pressure or under

atmospheric pressure.‣ When handling such sensors, wear protective goggles and suitable gloves.

Pressure-temperatureratings (absolute)

A C

10

12

14

16

18 B

50 100 200 250275

3005

0

40

80

120

160

200

246

[psi] p [bar]

T [°F]400 20 60 80 100

0

4

6

8

2

T [°C]

120 135-15

7

115

17

101

D

32176

158

70

A0025761

3 Pressure-temperature ratings

A Version AA, ASB Version BA, BTC Version FAD Atmospheric pressure

Minimum conductivity Version AA, BA, BT, FA: Min. 50 μS/cm (minimum flow; pressure and temperature must bestable)

Version AS: Min. 0.1 μS/cm (stainless steel flow assembly with grounding;stable and minimum flow; pressure and temperature must bestable)

pH range Version AA, AS: 1 to 12 pHVersion BA, BT: 0 to 14 pHVersion FA: 0 to 10 pH

NOTICERisk of damage to electrode‣ Never use the electrode outside of the listed specifications!

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Mechanical construction

Design, dimensions ofCPS11D

3

4

5

6

1

2

7

812(0.47)

120, 225, 360

(4.7

2, 8.8

6, 14.1

7)

50 (

1.9

7)

A0025726

4 CPS11D with Memosens plug-in head, temperaturesensor

1 Memosens plug-in head, Pg 13.52 Viton O-ring with thrust collar3 Ag/AgCl reference lead - reference4 "Advanced Gel" electrolyte5 Ag/AgCl reference lead - pH6 PTFE diaphragm7 pH glass membrane8 Temperature sensor NTC30K

3

4

5

6

1

2

7

8

9

12(0.47)

120, 225, 360

(4.7

2, 8.8

6, 14.1

7)

50 (

1.9

7)

A0025725

5 CPS11D-7BTxx, with ion trap

1 Memosens plug-in head, Pg 13.52 Viton O-ring with thrust collar3 Ag/AgCl reference lead - reference4 "Advanced Gel" electrolyte5 Ion trap6 Ag/AgCl reference lead - pH7 PTFE diaphragm8 pH glass membrane9 Temperature sensor NTC30K

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8 Endress+Hauser

Design, dimensions of CPS11

1

2

3

4

6

5

7

120, 225, 360, 425

(4.7

2, 8.8

6, 14.1

7, 16.7

3)

12 /0.47

A0025733

6 CPS11 with GSA plug-in head

1 GSA plug-in head, Pg 13.52 Viton O-ring with thrust collar3 Ag/AgCl reference lead - reference4 "Advanced Gel" electrolyte5 Ag/AgCl reference lead - pH6 PTFE diaphragm7 pH glass membrane

3

4

5

6

1

2

7

8

120, 225, 360, 425

(4.7

2, 8.8

6, 14.1

7, 16.7

3)

12 /0.47

A0025729

7 CPS11 with TOP68 plug-in head, temperature sensor

1 TOP68 plug-in head, Pg 13.52 Viton O-ring with thrust collar3 Ag/AgCl reference lead - reference4 "Advanced Gel" electrolyte5 Ag/AgCl reference lead - pH6 PTFE diaphragm7 pH glass membrane8 Temperature sensor Pt100

Weight 0.1 kg (0.2 lbs)

Materials Electrode shaft: Glass to suit processpH membrane glasses: Type A, B, FMetal lead: Ag/AgClDiaphragm: Ring-shaped Teflon® diaphragm, sterilizable, not cytotoxic

Process connection Pg 13.5

Temperature sensor CPS11D: NTC30KCPS11: Pt100, Pt1000

Plug-in heads CPS11D: Memosens plug-in head for digital, non-contact data transmission

CPS11:ESA: Threaded plug-in head Pg 13.5, TOP68 for electrodes with or without

temperature sensor, 17 bar abs. (246 psi) overpressure protection (threefold),Ex

GSA: Threaded plug-in head Pg 13.5 for electrodes without temperature sensor

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Reference system Version AA, BA, FA: Ag/AgCl reference lead with Advanced Gel 3M KCl, AgCl-freeVersion AS: Ag/AgCl reference lead with Advanced Gel, saturated KCl (> 3M KCl) with salt

rings, AgCl-freeThe following are indicative of used salt rings (fixed supply of KCl) underconstant process conditions (e.g. stable temperature and flow):• a continuous upward trend in the pH value (to alkaline pH values)• a continuous downward trend in the zero point (to acidic pH values)

following adjustment during calibrationBT version: Ag/AgCl reference lead with ion trap and Advanced Gel 3M KCl

Certificates and approvals

Ex approval for CPS11D • ATEX II 1G Ex ia IIC T3/T4/T6 Ga• FM / CSA Class I Div. 2, in conjunction with Liquiline M CM42 and Mycom S CPM153 transmitters

Hazardous area versions of the digital sensors with Memosens technology are marked by a red-orange ring in the plug-in head.

Ex approval for CPS11(TOP68)

• ATEX II 1G Ex ia IIC T3/T4/T6 Ga• FM Class I Div. 2, in conjunction with Liquiline M CM42 and Mycom S CPM153 transmitters

Biocompatibility Cytotoxicity verified in accordance with:USP 2009, chapter <88> (USP Class VI) for diaphragm

TÜV certificate forMemosens plug-in head

Pressure resistance 16 bar rel. (232 psi), minimum three times the safety pressure

TÜV certificate for TOP68plug-in head

Pressure resistance 16 bar rel. (232 psi), minimum three times the safety pressure

CPS11D electromagneticcompatibility

Interference emission and interference immunity as per EN 61326: 2012

Ordering information

Product page www.endress.com/cps11d

www.endress.com/cps11

Product Configurator The navigation area is located on the right of the product page.1. Under "Device support" click "Configure your selected product".

The Configurator opens in a separate window.2. Select all the options to configure the device in line with your requirements.

In this way, you receive a valid and complete order code for the device.3. Export the order code as a PDF or Excel file. To do so, click the appropriate button at the top of

the screen.

Scope of delivery The scope of delivery includes:• Sensor in the version ordered• Technical Information

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10 Endress+Hauser

AccessoriesThe following are the most important accessories available at the time this documentation wasissued. For accessories not listed here, please contact your service or sales office.

Assemblies Cleanfit CPA871• Flexible process retractable assembly for water, wastewater and the chemical industry• For applications with standard 12mm sensors• Product Configurator on the product page: www.endress.com/cpa871

Technical Information TI01191C

Cleanfit CPA875• Retractable process assembly for sterile and hygienic applications• For in-line measurement with standard 12 mm sensors for parameters such as pH, ORP and

oxygen• Product Configurator on the product page: www.endress.com/cpa875

Technical Information TI01168C

Cleanfit CPA472D• Robust retractable assembly for pH, ORP and other industrial sensors• Heavy-duty version made of durable materials• For manual or pneumatic, remote-controlled operation• Product Configurator on the product page: www.endress.com/cpa472d

Technical Information TI00403C

Cleanfit CPA450• Manual retractable assembly for installing 120 mm sensors in tanks and pipes• Product Configurator on the product page: www.endress.com/cpa450

Technical Information TI00183C

Cleanfit CPA471• Compact stainless steel retractable assembly for installation in tanks and pipes, for manual or

pneumatically remote-controlled operation• Product Configurator on the product page: www.endress.com/cpa471

Technical Information TI00217C

Cleanfit CPA472• Compact plastic retractable assembly for installation in tanks and pipes• For manual or pneumatic, remote-controlled operation• Product Configurator on the product page: www.endress.com/cpa472

Technical Information TI00223C

Cleanfit CPA473• Stainless steel process retractable assembly with ball valve shutoff for particularly reliable

separation of the medium from the environment• Product Configurator on the product page: www.endress.com/cpa473

Technical Information TI00344C

Cleanfit CPA474• Plastic process retractable assembly with ball valve shutoff for particularly reliable separation of

the medium from the environment• Product Configurator on the product page: www.endress.com/cpa474

Technical Information TI00345C

Unifit CPA442• Installation assembly for food, biotechnology and pharmaceutics• With EHEDG and 3A certificate• Product Configurator on the product page: www.endress.com/cpa442

Technical Information TI00306C

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Endress+Hauser 11

Dipfit CPA111• Immersion and installation assembly made of plastic for open and closed vessels• Product Configurator on the product page: www.endress.com/cpa111

Technical Information TI00112C

Dipfit CPA140• pH/ORP immersion assembly with flange connection for very demanding processes• Product Configurator on the product page: www.endress.com/cpa140

Technical Information TI00178C

Flowfit CPA240• pH/ORP flow assembly for processes with stringent requirements• Product Configurator on the product page: www.endress.com/cpa240

Technical Information TI00179C

Flowfit CPA250• Flow assembly for pH/ORP measurement• Product Configurator on the product page: www.endress.com/cpa250

Technical Information TI00041C

Ecofit CPA640• Set comprising adapter for 120 mm pH/ORP electrodes and sensor cable with TOP68 coupling• Product Configurator on the product page: www.endress.com/cpa640

Technical Information TI00246C

Flexdip CYA112• Immersion assembly for water and wastewater• Modular assembly system for sensors in open basins, channels and tanks• Product Configurator on the product page: www.endress.com/cya112

Technical Information TI00432C

Buffer solutions High-quality buffer solutions from Endress+Hauser - CPY20The secondary buffer solutions have been referenced to primary reference material of the PTB(German Federal Physico-technical Institute) and to standard reference material of NIST (NationalInstitute of Standards and Technology) according to DIN 19266 by a DKD (German CalibrationService) accredited laboratory.Product Configurator on the product page: www.endress.com/cpy20

Measuring cables CYK10 Memosens data cable• For digital sensors with Memosens technology• Product Configurator on the product page: www.endress.com/cyk10

Technical Information TI00118C

CPK9• Terminated measuring cable for connecting analog sensors with TOP68 plug-in head• Selection in accordance with product structure

For more information and to order, please contact your sales office.

CPK1For pH/ORP electrodes with GSA plug-in head

Ordering information is available from your sales office or at www.endress.com.

www.addresses.endress.com